Process for the manufacture of soldered chains and wire tissues from wire of solid cross-section.



UNITED .STATES PATENT OFFICE.

THEODOR BRCK, OF PFORZHEIM, GERMANY.

PROCESS FOR THE MANUFACTURE 0F SOLDERED CHAINSVAND WIRE TISSUES FROM WIRE 0F SOLID CROSS-SECTION.

To f/N 'ifi/mm. it may concern.'

Pie it known that I, THnoooR BRCK, a subject of the Grand Duke of Baden, residing at Pforzheim, Germany, have invented certain new and useful Improvements in Processes for the Manufacture of Soldered Chains and IVireTissues from Vire of Solid Cross-Section, of which the following is a specification.

The i'nanufacture of chains from wire of solid cross section is well known. The usual manufacturing methods present however certain inconveniences. The soldering of the links is difficult and it often happens f that, after the link is finished, the small lump of solder drops out of the joint. It. has already been proposed, to hollow the joint or to bore a hole into the end of the wire. the solder to be placed in the cavity which is thus formed. But even with this method of manufacture, it happens that the solder gets lost. This manufacturing method has further the inconvenience that the joint looks as if it was not tight owing to the hollowing of the ends of the wires.

The improved method according to the invent-ion consists in providing at the middlel of the end surface of the wire a bur hehind which the strip of solder is pushed whereupon, by means of a punch of special shape, a piece of solder of the required length is cut oft the strip, the bur beingr at the saine time. pressed against the. end of the wire so that it clamps in place the piece of solder which thus cannot get lost during the further manipulation.

In the accompanying drawings the execution of the improved process is diagramniatically illustrated.

Figure 1 shows a piece of wire from which the link is to be formed, said piece of wire being represented at the moment when the bur is being produced. Fig. 2 illustrates the insertion and the fix-ing of the piece of solder. F ig. 3 shows the cut olf piece of Specification of Letters Patent.

Patented Sept. 16, 1913.

Application filed March 27, 1913. Serial No. 757,265.

The vwire .fr designed to forni the chainV links or the links of the wire tissue is pushed in the Wellv known manner along a groove of the beam toward the pincers c. A

At each movement a piece nl is cut off the wire by a punch e of convenient shape, whereupon a chisel f is guided alon the end of the wire to be gripped by the pincers c, so that by said chisel a bur g is cut outJ of said end of the wire. The strip i of solder (Fig. 2) is brought, through the inediuni of a conveyer li., behind this bur. A punch which has a cutting edge Z and an oblique pressing surface m is moved toward the conveyer /i so that it cuts off the piece of solder which is behind the bur simultaneously pressing the bur upon the cutoff piece of solder which is thus pressed against the. end of the piece of wire and forms a flat surface. The piece of solder is thus solidly connected with the piece of' wire so that the wire can be bent by the chainmaking machine in the usual manner.

I claimt The method of manufacturing solder chains and wire tissues from wire of solid cross section consisting in producing a bur in the end of the cut oif wire designed to form the chain link, in pushing` the strip of solder behind said bur, in cutting olf from said strip of solder a piece of required length, and in simultaneously bending the bur over so that it presses the piece of solder upon the end of the wire, substantially as described and for the purpose set forth. In witness whereof I have hereunto set my hand in the presence of two witnesses.

'ri-monos BRCK.

Witnesses Fss KARL, LUIsn SCHELLER. 

